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HK: Hadronen und Kerne

HK 32: Kernspektroskopie, mittelschwere Kerne I

HK 32.3: Vortrag

Dienstag, 25. März 1997, 17:45–18:00, HS E

Production cross-sections and fission-yields of very neutron-rich fission fragments at GSI — •C. Engelmann¹, F. Ameil², P. Armbruster¹, M. Bernas², C. Böckstiegel³, S. Czajkowski⁴, Ph. Dessagne⁵, C. Donzaud², H. Geissel¹, A. Heinz¹, Z. Janas⁶, C. Kozhuharov¹, C. Miehé⁵, G. Münzenberg¹, M. Pfützner⁶, W. Schwab¹, C. Stéphan², K. Sümmerer¹, L. Tassan-Got², and B. Voss¹ — ¹Gesellschaft für Schwerionenforschung, Darmstadt, Germany — ²IPN Orsay, BP 1, IN2P3 CNRS, France — ³Institut für Kernphysik, TH Darmstadt, Germany — ⁴CENBG, Bordeaux-Gradignan, IN2P3 CNRS, France — ⁵CRN Strasbourg, IN2P3 CNRS, France — ⁶Warsaw University, Poland

Fission of relativistic ²³⁸U projectiles is a new powerful method [1] for the production of very neutron-rich fission fragments. The relativistic kinematic renders possible the separation of the fission fragments with the fragment separator, FRS, at GSI Darmstadt and the identification of their mass and nuclear charge. In a recent experiment about 100 new neutron-rich isotopes were produced and identified for the first time, including the doubly-magic nucleus ₂₈⁷⁸Ni [2]. The method, the fission yields and the production cross sections, and the feasibility of these new isotopes for secondary beams will be discussed.

[1] Bernas, M. et al.: Phys. Lett. B331 (1994)19-24

[2] Engelmann, C. et al.: Z.Phys. A352 351-352(1995)